Carriage-top.



' J. B. AMBL ER.

' CARRIAGE TOP. APPLICATION FILED NOV. 16, 1909.

. "Patented May 6, 1913.

J. B; AMBLER.

CARRIAGE TOP.

APPLICATION ITILED NOV. 15, 1909.

' 1,061,031. v PatentedMay"6,1913.-

2 SHEETS-SHEET 2.

I UNITED JOSEPH B. AMBLERY or ,cnn LLA MIcmGA v. v M

w? ,F jlb CARRIAGE-TOP.

Specification of Application filed November 15, 1909 S eri al No 528,125. i I

proved bow support having a tight joint.

when the bows are extended, and, 'at the same time, one which adjusts freely when the bows are collapsed.- Second, to provide in a carriage top an improved construction whereby the wear on the supporting stud and the stud-engaging members is largely .overcome and the shearing strain on the studs is largely overcome.

Further objects, and objects, relating to structural details, will definitely appear from the detailed description to follow. Y I accomplish the objects of my invention by the devices and means described in the following specification.

The structure described constitutes one effective embodiment. of my invent-ion.

Other'emb'odiments' would be readily devised by those skilled in the art.

The invention is clearly defined and pointed out in'the' claims.

A structure constitutingan effective and referred embodiment of the features of my lnvent-ionis clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure 1 is a detail perspective view of a structure embodying the features of my invention. Fig. 2 is a detail perspective view of the parts involving the features of my invention of the structure shown in Fig. 1 disassembled; Fig. 3 is an enlarged detail section, taken on a line corresponding to line 3-3 of Fig. 1, a portion of the stud being shown in full lines. Fig. 4 is an enlarged detail view of a joint member 12, showing the cam surface much exaggerated.

In the drawings, similar reference numerals refer to similar parts "throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, 1 represents Letters Patent. Patented 6,

. "which is, the structure turned l" upwardly at 3 to support; the.stud ,4 by

whichthe carriage top,bows 5 are carried. The structure illustrated isa fourbow struc- 1ture., l i I The stud 4.is provided with tegral with the seat rail 2, having a concavlty on its inner engaging face. Theface toward the seat isconvex. The stud 4-is preferably provided .Iwith a longitudinal groove, 7, which is engaged by the lug 8 of the concave washer 9, whereby turning ol the washer is prevented. threaded upon the stud.

. A' apped nut lo i The bows 5 are Pr i e wiaijointiri i here 11, 12, 13 14,,perforated to receive The oint member ll, which is the stud 4. one of the intermediate members, is convex, on both sides,%that-is,- double convex. omtj members 12, 13 and l4 areconcaydconvex to coact withit-he member 11 and 1 -with thehead 6 and washer 9 of the stud.

The joint members 12, 13 and 14 are substantially the same form, but are offset on the bows at different angles to permit the collapsing of the hows together. At least,

one of the stud-engaging members for the bows is preferably a cam member, as shown in Fig. 4, and the bearing surface of the adjacent member is conformed thereto, so that, when the bows are erected, the stud-engaging members are tightened or clamped together upon the stud, thereby preventing rattling and movement of the members upon. Y

each other. This cam formation is shown in exaggerated formin Fig. 4, and may be the form of any joint member the adjacent member being conformed thereto. The joint members 11, 12, 13 and 14 are co-engaging members, because the convexity of each en'-, gages the concavity of the adjacent joint member and any thrust is taken'up by the members themselves rather than upon the stud, so that the stud is not worn nor sheared and the joint'thereby loosened.

The form I have illustrated and described is the form preferred, and I desire to claim it specifically and broadly as well.

My improved support is very strong and durable and possesses the advantage of be-@ ing noiseless,-that is, the jointis tightened when the bows are extended so that there is no possibility of rattling, and, of course, this largely obviates the wear on the parts.

the seat of a carriage, and 2 the seat rail, 7

I claim "as new and desire to secure by Letters Patent is:

1. In a carriage top, the combination with the'seat' rail, of a longitudinally-grooved c washer,

ing joint members-1 members being dou ble convex,

threaded" stud having a concaved. head integral with said rail; a nut for said study a concaved washer having a. oove-engaging lug thereon and bows wit stud-engagthe' others being concavo-convez/to coact therewith and with each other arid, the stud head and one of saidlstud-engaging members I being a cam memberthe contact surface of the adjacent member corresponding to said car'n whereby a tightening action of the joint is secured by the extending of the bows.

2. In a carriage top the combination with a longitudinally-grooved threadedst-ud havin a concavedhead associated with a suitab e 'support;-a nut for said stud; a con.-

cave-convex to coact each other and the stud head and washer,

caved washer having a groove-engaging lug thereon; and bows with stud-engaging ]O1I1t members, one of the stud-en aging members being double convex, the ot ers being contherewith and with i oneoisaidstud-engaging members being a eam'member the contact surface of the adjacent member corresponding to said' cam one of the stud-engaging whereby a tightening action of the joint is secured by the extending of the bows.

3; In a carriage top, the combination with a longitudinally-grooved threaded stud having a concaved head associated with a suite tact surface of the adjacent member corresponding to said cam whereby a tightening or clamping action is secured when the bows are extended andloosened when said bows are collapsed; a washer adapted to engage said stud; and a screw nut. to retain said parts.

, In witness whereof,, I have hereunto set my hand and seal in the presence of two witnesses.

JOSEPH B. AMBLER. [1. 5.] .Witness'es: i

WILLIAM E. SMITH,

'D. E. McIN'rYnn. 

